/* ===== HiTi hiti2 现代玻璃拟态风格 ===== */
/* 默认主题: 红粉活力 (HiTi) */
:root,
[data-theme="red"]{
  --red:#E4002B; --red2:#FF5A7A; --pink:#FF7EB3;
  --ink:#15151f; --muted:#5b5b6b; --line:#ececf3;
  --bg:#f6f7fb; --glass:rgba(255,255,255,.65); --glass-border:rgba(255,255,255,.6);
  --header-bg:rgba(246,247,251,.8);
  --shadow:0 18px 50px rgba(30,20,60,.10);
  --grad:linear-gradient(120deg,#E4002B 0%,#FF5A7A 55%,#FF7EB3 100%);
  --glow1:rgba(255,126,179,.25); --glow2:rgba(228,0,43,.18);
  --tint:rgba(228,0,43,.08); --tint-faint:rgba(228,0,43,.04);
  --cta-shadow:0 10px 26px rgba(228,0,43,.28); --cta-shadow-strong:0 16px 34px rgba(228,0,43,.36);
  --radius:22px;
}
/* 主题二: 商务蓝 */
[data-theme="blue"]{
  --red:#1E63E9; --red2:#3FA9F5; --pink:#5BE0E6;
  --ink:#14233f; --muted:#5a6b85; --line:#e6edf7;
  --bg:#f4f7fd; --glass:rgba(255,255,255,.7); --glass-border:rgba(255,255,255,.7);
  --header-bg:rgba(244,247,253,.85);
  --shadow:0 18px 50px rgba(20,40,80,.10);
  --grad:linear-gradient(120deg,#0B4FD6 0%,#3FA9F5 55%,#5BE0E6 100%);
  --glow1:rgba(91,224,230,.22); --glow2:rgba(30,99,233,.16);
  --tint:rgba(30,99,233,.08); --tint-faint:rgba(30,99,233,.04);
  --cta-shadow:0 10px 26px rgba(30,99,233,.28); --cta-shadow-strong:0 16px 34px rgba(30,99,233,.36);
}
/* 主题三: 极简白 */
[data-theme="white"]{
  --red:#14161a; --red2:#3a4049; --pink:#8a929c;
  --ink:#16181d; --muted:#6b7280; --line:#ebecef;
  --bg:#ffffff; --glass:rgba(255,255,255,.88); --glass-border:rgba(0,0,0,.07);
  --header-bg:rgba(255,255,255,.82);
  --shadow:0 14px 40px rgba(20,24,33,.07);
  --grad:linear-gradient(120deg,#16181d 0%,#3a4049 60%,#8a929c 100%);
  --glow1:rgba(0,0,0,.045); --glow2:rgba(0,0,0,.03);
  --tint:rgba(20,22,26,.06); --tint-faint:rgba(20,22,26,.03);
  --cta-shadow:0 10px 24px rgba(20,22,26,.18); --cta-shadow-strong:0 16px 32px rgba(20,22,26,.24);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.glass{background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow);border-radius:var(--radius)}

/* header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:var(--header-bg);border-bottom:1px solid var(--line)}
.header-inner{max-width:1200px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;gap:18px}
.brand{display:flex;flex-direction:column;line-height:1}
.brand-mark{font-weight:900;font-size:1.5rem;letter-spacing:.5px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-sub{font-size:.7rem;color:var(--muted);margin-top:2px}
.nav{display:flex;gap:8px;margin-left:auto}
.nav-link{padding:8px 14px;border-radius:12px;color:var(--muted);font-weight:500;transition:.2s}
.nav-link:hover,.nav-link.active{color:var(--red);background:var(--tint)}
.cta-btn{display:inline-block;background:var(--grad);color:#fff;font-weight:700;
  padding:11px 22px;border-radius:14px;box-shadow:var(--cta-shadow);transition:.25s}
.cta-btn:hover{transform:translateY(-2px);box-shadow:var(--cta-shadow-strong)}
.ghost-btn{display:inline-block;padding:11px 22px;border-radius:14px;border:1px solid var(--line);
  color:var(--ink);font-weight:600;background:#fff;transition:.2s}
.ghost-btn:hover{border-color:var(--red);color:var(--red)}
.header-cta{padding:9px 16px;font-size:.9rem}
.menu-toggle{display:none;background:none;border:none;font-size:1.4rem;margin-left:auto;cursor:pointer}

.site-main{max-width:1200px;margin:0 auto;padding:0 22px}
.section{padding:64px 0}
.section-head{margin-bottom:30px}
.section-head h2{font-size:2rem;font-weight:900}
.section-head p{color:var(--muted);margin-top:6px}

/* hero */
.hero{position:relative;overflow:hidden;padding:70px 22px}
.hero-bg{position:absolute;inset:0;
  background:
   radial-gradient(60% 70% at 80% 10%,var(--glow1),transparent 60%),
   radial-gradient(50% 60% at 10% 90%,var(--glow2),transparent 60%);
  filter:blur(4px)}
.hero-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;
  gap:40px;align-items:center;position:relative}
.eyebrow{display:inline-block;font-size:.85rem;font-weight:700;color:var(--red);
  background:var(--tint);padding:6px 14px;border-radius:30px}
.hero-text h1{font-size:3.1rem;line-height:1.15;font-weight:900;margin:16px 0}
.hero-text p{color:var(--muted);font-size:1.05rem;max-width:520px}
.hero-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.hero-collage{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.hero-collage img{border-radius:18px;box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:contain;
  background:#fff;padding:8px}
.hero-collage img:nth-child(1){transform:translateY(14px) rotate(-3deg)}
.hero-collage img:nth-child(3){transform:translateY(-10px) rotate(3deg)}
.hero-collage img:nth-child(5){transform:translateY(8px)}

/* category */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.cat-block{padding:24px}
.cat-block h3{font-size:1.25rem;margin-bottom:14px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:30px;
  font-size:.9rem;font-weight:600;transition:.2s}
.chip:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px)}

/* product grid */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:22px}
.prod-card{overflow:hidden;transition:.28s;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 26px 60px rgba(30,20,60,.16)}
.prod-thumb{background:#fff;padding:18px;display:flex;align-items:center;justify-content:center;height:210px;position:relative}
.prod-thumb img{max-height:170px;width:auto;object-fit:contain}

/* new-model badge */
.prod-badge{position:absolute;top:12px;right:12px;z-index:2;background:var(--grad);color:#fff;
  font-size:.72rem;font-weight:800;letter-spacing:.5px;padding:5px 12px;border-radius:20px;
  box-shadow:0 6px 16px rgba(228,0,43,.32);white-space:nowrap}
.prod-badge-inline{display:inline-block;vertical-align:middle;margin-left:12px;background:var(--grad);
  color:#fff;font-size:.76rem;font-weight:800;letter-spacing:.5px;padding:5px 14px;border-radius:20px;
  box-shadow:0 6px 16px rgba(228,0,43,.32);white-space:nowrap}
.prod-meta{padding:18px 20px 22px}
.prod-cat{font-size:.75rem;font-weight:700;color:var(--red);letter-spacing:.5px}
.prod-meta h3{font-size:1.35rem;margin:6px 0 8px}
.prod-meta p{color:var(--muted);font-size:.92rem;min-height:42px}
.prod-link{display:inline-block;margin-top:12px;font-weight:700;color:var(--red)}

/* cta section */
.cta-section{padding-top:10px}
.cta-card{padding:48px;text-align:center}
.cta-card h2{font-size:2rem;margin-bottom:12px}
.cta-card p{color:var(--muted);margin-bottom:22px}

/* product detail */
.prod-hero{padding:50px 0 20px}
.prod-hero-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center}
.prod-hero-img{padding:26px;display:flex;justify-content:center;background:#fff}
.prod-hero-img img{max-height:380px;width:auto;object-fit:contain}
.prod-hero-info .prod-cat{font-size:.8rem;font-weight:700;color:var(--red);letter-spacing:.5px}
.prod-hero-info h1{font-size:3rem;font-weight:900;margin:8px 0 14px}
.prod-hero-info .lead{color:var(--muted);font-size:1.05rem;max-width:540px}
.prod-hero-info .hero-actions{margin-top:24px}

.feat-row{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;
  padding:26px 0;border-top:1px solid var(--line)}
.feat-row.reverse .feat-img{order:2}
.feat-img{background:#fff;border-radius:18px;padding:16px;box-shadow:var(--shadow)}
.feat-img img{max-height:300px;width:auto;margin:0 auto;object-fit:contain}
.feat-text h3{font-size:1.5rem;margin-bottom:10px}
.feat-text p{color:var(--muted)}

.spec-card{padding:30px}
.spec-card h3{font-size:1.4rem;margin-bottom:16px}
.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{width:32%;color:var(--muted);font-weight:600}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}

.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.gallery img{background:#fff;border-radius:14px;padding:10px;box-shadow:var(--shadow);
  aspect-ratio:4/3;object-fit:contain}

/* downloads */
.dl-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.dl-tab{background:#fff;border:1px solid var(--line);padding:9px 18px;border-radius:30px;
  font-weight:600;cursor:pointer;transition:.2s}
.dl-tab:hover{border-color:var(--red);color:var(--red)}
.dl-tab.active{background:var(--grad);color:#fff;border-color:transparent}
.dl-table-wrap{padding:8px 8px 14px;overflow:hidden}
.dl-table{width:100%;border-collapse:collapse;font-size:.92rem}
.dl-table thead th{text-align:left;padding:14px 12px;color:var(--muted);font-weight:700;
  border-bottom:2px solid var(--line);font-size:.82rem;letter-spacing:.3px}
.dl-table tbody td{padding:13px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.dl-row:hover{background:var(--tint-faint)}
.dl-cat{font-weight:700;color:var(--red)}
.dl-name{font-weight:600}
.dl-size{color:var(--muted);white-space:nowrap}
.os-badge{display:inline-block;background:var(--tint);color:var(--red);
  padding:3px 10px;border-radius:20px;font-size:.78rem;font-weight:700}
.dl-link{display:inline-block;background:var(--grad);color:#fff;font-weight:700;
  padding:8px 16px;border-radius:11px;white-space:nowrap;transition:.2s}
.dl-link:hover{transform:translateY(-2px)}
.dl-note{color:var(--muted);font-size:.85rem;margin-top:14px}

/* footer */
.site-footer{background:#11111a;color:#cfcfe0;margin-top:40px}
.footer-inner{max-width:1200px;margin:0 auto;padding:54px 22px 30px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer-col .brand-mark{color:#fff;background:none;-webkit-text-fill-color:#fff;font-size:1.6rem}
.footer-col p{color:#9a9ab0;font-size:.9rem;margin-top:8px}
.footer-col h4{color:#fff;margin-bottom:12px;font-size:1rem}
.footer-col a{display:block;color:#9a9ab0;font-size:.9rem;padding:4px 0;transition:.2s}
.footer-col a:hover{color:#fff}
.footer-col .foot-phone{margin-top:8px}
.footer-col .foot-phone a{display:inline;color:#fff;font-weight:700;padding:0}
.footer-col .foot-phone a:hover{color:var(--red)}
.footer-col .foot-email{margin-top:4px}
.footer-col .foot-email a{display:inline;color:#fff;font-weight:700;padding:0}
.footer-col .foot-email a:hover{color:var(--red)}
.footer-bottom{border-top:1px solid #26263a;text-align:center;padding:18px;
  color:#74748c;font-size:.82rem}

/* news page */
.news-wrap{max-width:1200px;margin:0 auto;padding:0 22px}
.news-year{font-size:1.5rem;font-weight:900;margin:34px 0 16px;display:flex;align-items:center;gap:14px}
.news-year::after{content:"";flex:1;height:1px;background:var(--line)}
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:20px}
.news-card{padding:22px 22px 20px;display:flex;flex-direction:column;gap:10px;transition:.25s}
.news-card:hover{transform:translateY(-4px);box-shadow:0 22px 50px rgba(30,20,60,.14)}
.news-date{font-size:.8rem;font-weight:700;color:var(--red);letter-spacing:.5px}
.news-card h3{font-size:1.08rem;line-height:1.45}
.news-card p{color:var(--muted);font-size:.9rem;line-height:1.65;flex:1}
.news-link{margin-top:6px;color:var(--red);font-weight:700;font-size:.88rem}
.news-link:hover{text-decoration:underline}
.news-disclaimer{margin-top:34px;padding-top:18px;border-top:1px solid var(--line);
  color:var(--muted);font-size:.82rem}

/* news article detail */
.article-back{display:inline-block;margin:8px 0 4px;color:var(--muted);font-weight:600;font-size:.9rem}
.article-back:hover{color:var(--red)}
.article-meta{font-size:.85rem;font-weight:700;color:var(--red);letter-spacing:.5px;margin:10px 0 18px}
.article-body{max-width:820px;margin:0 auto;font-size:1rem;line-height:1.85;color:#2a2740}
.article-body p{margin:0 0 18px}
.article-body .lead{font-size:1.06rem;color:#3a3656}
.article-source{margin:30px 0 6px;padding-top:16px;border-top:1px solid var(--line);
  color:var(--muted);font-size:.82rem}

/* about page */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-bottom:22px}
.about-block{padding:24px}
.about-block h3{font-size:1.12rem;margin-bottom:10px;color:var(--red)}
.about-block p{color:#3a3656;line-height:1.8;font-size:.95rem}
.about-contact{padding:22px 24px}
.about-contact h3{font-size:1.1rem;margin-bottom:12px}
.about-contact-row{display:flex;gap:12px;padding:7px 0;border-bottom:1px dashed var(--line);font-size:.95rem}
.about-contact-row:last-child{border-bottom:none}
.ac-label{color:var(--muted);min-width:84px;font-weight:600}
.ac-value{color:#2a2740;font-weight:700}
.ac-value[href]{color:var(--red)}

/* responsive */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .hero-text h1{font-size:2.3rem}
  .prod-hero-inner{grid-template-columns:1fr}
  .feat-row{grid-template-columns:1fr;gap:16px}
  .feat-row.reverse .feat-img{order:0}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav{position:absolute;top:100%;right:0;left:0;flex-direction:column;background:#fff;
    padding:14px 22px;gap:6px;border-bottom:1px solid var(--line);display:none}
  .nav.open{display:flex}
  .header-cta{display:none}
  .menu-toggle{display:block}
  .hero-collage{grid-template-columns:repeat(2,1fr)}
  .section{padding:44px 0}
  .section-head h2{font-size:1.6rem}
  .dl-table thead{display:none}
  .dl-table,.dl-table tbody,.dl-row,.dl-table td{display:block;width:100%}
  .dl-row{border:1px solid var(--line);border-radius:14px;padding:8px 12px;margin-bottom:12px;background:#fff}
  .dl-table tbody td{padding:6px 0;border:none}
  .dl-link{width:100%;text-align:center}
  .footer-inner{grid-template-columns:1fr}
}

/* ===== 风格切换 ===== */
.theme-switch{display:flex;gap:6px;align-items:center;margin-left:10px;opacity:.6;transition:opacity .2s}
.theme-switch:hover{opacity:1}
.theme-dot{width:14px;height:14px;border-radius:50%;border:1px solid rgba(255,255,255,.7);
  cursor:pointer;padding:0;box-shadow:0 0 0 1px var(--line);transition:.2s}
.theme-dot.t-red{background:linear-gradient(120deg,#E4002B,#FF7EB3)}
.theme-dot.t-blue{background:linear-gradient(120deg,#0B4FD6,#5BE0E6)}
.theme-dot.t-white{background:linear-gradient(120deg,#16181d,#8a929c)}
.theme-dot.active{box-shadow:0 0 0 2px var(--red);transform:scale(1.12)}

/* ===== 语言切换 ===== */
.lang-switch{display:flex;gap:2px;align-items:center;margin-left:10px;
  background:var(--glass);border:1px solid var(--line);border-radius:30px;padding:3px 5px}
.lang-opt{font-size:.74rem;font-weight:700;line-height:1;padding:5px 9px;border-radius:20px;
  color:var(--muted);text-decoration:none;transition:.2s;white-space:nowrap}
.lang-opt:hover{color:var(--red)}
.lang-opt.active{background:var(--grad);color:#fff;box-shadow:0 4px 12px rgba(228,0,43,.25)}
@media(max-width:900px){.lang-switch{margin-left:auto}}

.theme-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.theme-card{cursor:pointer;text-align:left;padding:24px;transition:.25s;border:2px solid transparent}
.theme-card:hover{transform:translateY(-4px);box-shadow:0 22px 50px rgba(30,20,60,.14)}
.theme-card.active{border-color:var(--red)}
.tc-swatch{display:block;height:64px;border-radius:14px;margin-bottom:14px}
.sw-red{background:linear-gradient(120deg,#E4002B,#FF7EB3)}
.sw-blue{background:linear-gradient(120deg,#0B4FD6,#5BE0E6)}
.sw-white{background:linear-gradient(120deg,#16181d,#8a929c)}
.theme-card h3{font-size:1.2rem;margin-bottom:6px}
.theme-card p{color:var(--muted);font-size:.9rem}
@media(max-width:680px){
  .theme-switch{margin-left:auto}
}
.theme-picker-low{display:flex;align-items:center;justify-content:center;gap:10px;
  margin:14px auto 0;padding:8px 16px;font-size:.82rem;color:var(--muted);
  background:var(--glass);border:1px solid var(--line);border-radius:40px;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  width:max-content;max-width:92%}
.tp-label{font-weight:600;letter-spacing:.04em;opacity:.65}
.theme-picker-low .theme-switch{opacity:1;margin-left:0}
}

/* milestone timeline */
.ms-year{font-size:1.35rem;font-weight:900;color:var(--red);margin:28px 0 10px;
  display:flex;align-items:center;gap:12px}
.ms-year::after{content://;flex:1;height:1px;background:var(--line)}
.ms-list{margin:0 0 6px;padding-left:0;list-style:none}
.ms-list li{position:relative;padding-left:22px;margin-bottom:8px;color:#3a3656;
  line-height:1.8;font-size:.96rem}
.ms-list li::before{content://;position:absolute;left:4px;top:.72em;width:7px;height:7px;
  border-radius:50%;background:var(--red)}

/* award cards */
.award-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.award-card{padding:20px 22px}
.award-card h3{font-size:1.02rem;color:var(--red);margin-bottom:8px;line-height:1.5}
.award-card p{color:var(--muted);font-size:.92rem;line-height:1.7}

/* locations */
.loc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.loc-card{padding:22px 24px;white-space:pre-line;line-height:1.85;font-size:.94rem;color:#3a3656}

/* about sub-page links */
.about-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.about-links a{display:inline-block;padding:10px 20px;border-radius:30px;font-weight:700;
  font-size:.92rem;background:var(--glass);border:1px solid var(--line);color:var(--red)}
.about-links a:hover{background:var(--grad);color:#fff;border-color:transparent}